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Thornless Blackberry Garden Giant - Rubus fruticosus

Rubus fruticosus Géante des jardins
Blackberry, Bramble

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A thornless Blackberry with rapid and vigorous growth. It should be trained along a wall on tensioned wire or a sturdy trellis. It produces large, shiny, sweet blackberries that are best eaten fresh and can be used for making good jams, jellies, or pies. This variety has very ornamental, finely-cut foliage. Hardy down to -15 °C, it is easy to grow in ordinary, not too dry to moist soil, in full sun or partial shade. It should be pruned every year for good fruit production.
Flavour
Sugary
Height at maturity
5 m
Spread at maturity
2.50 m
Exposure
Sun, Partial shade
Self-fertilising
Best planting time March, October
Recommended planting time February to April, September to November
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Flowering time May to June
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Harvest time August to September
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Description

The 'Garden Giant'  Blackberry is a fruiting Bramble (Rubus fruticosus) remarkable for its large fruits. It grows rapidly and vigorously, so training its long branches along a wall or on a sturdy trellis is essential. This self-fertile variety is relatively early and produces its big, sweet blackberries as early as August. They can be enjoyed fresh or used in desserts, pies, or jams. This Bramble does not have thorns and its finely cut foliage is quite decorative. It should be planted in ordinary soil, not too dry to moist, in full sun or partial shade.

The Rubus fruticosus 'Garden Giant' Blackberry belongs to the large and vital Rosaceae family, which provides us with a multitude of ornamental species (Roses, of course, but also Photinia, Cotoneaster, Amelanchier...) as well as most of our temperate climate fruit trees (Pear, Apple, Cherry, Peach, Apricot, Plum...). Rubus is highly diverse, with at least 500 species in France alone and probably a thousand worldwide. Some are ornamental, with decorative or aesthetically pleasing white shoots, as in Rubus thibetanus. And others have culinary interests, like raspberries (Rubus idaeus) and blackberries (Rubus fruticosus).

'Garden Giant' Blackberry is a vigorous variety that can reach a height of 5m (16ft) and a width of 2.5m (8ft). The plant has attractive, deeply cut, dark green foliage with serrated edges. This unique foliage has real ornamental value in the garden. This bramble is thornless, making harvesting the fruits from the unarmed branches easy. The branches reach maturity in the second year and can then produce fruit. But before that, the abundant honey-scented flowering displays numerous small white flowers, 1.5 to 2 cm (1in) in diameter, grouped in clusters in May and June. The fruits that appear afterwards are formed by drupes clustered on the receptacle, adherent. They are large, initially red and then turning black by August. They are ready to be picked and have a deliciously sweet taste. They can be consumed fresh, used in pies or jams, and frozen.

The 'Garden Giant' Bramble, with its finely cut leaves, is decorative for much of the year and can gracefully cover a wall. Of course, its main attraction lies in its succulent large blackberries, which can be combined with Marastar raspberries, a perpetual variety produced from July to October. Also consider blackcurrant bushes and currant bushes, such as the variety Rovada with its long clusters of fragrant, slightly acidic red fruits. And for a touch of originality, sow some Peruvian Ground Cherry, also known as Love in a Cage, whose orange fruits will delight your taste buds at the end of summer.

Thornless Blackberry Garden Giant - Rubus fruticosus in pictures

Thornless Blackberry Garden Giant  - Rubus fruticosus (Harvest) Harvest

Plant habit

Height at maturity 5 m
Spread at maturity 2.50 m
Growth rate fast

Fruit

Fruit colour black
Flavour Sugary
Use Table, Jam, Patisserie
Harvest time August to September

Flowering

Flower colour white
Flowering time May to June
Inflorescence Cluster
Flower size 2 cm
Bee-friendly Attracts pollinators

Foliage

Foliage persistence Deciduous
Foliage colour dark green

Botanical data

Genus

Rubus

Species

fruticosus

Cultivar

Géante des jardins

Family

Rosaceae

Other common names

Blackberry, Bramble

Origin

Cultivar or hybrid

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Planting and care

The 'Garden Giant' Blackberry prefers deep, fertile soils that are not too dry to moist. It is a low-maintenance plant that will adapt to any ordinary soil that is not too dry in sunny or semi-shaded exposure. It is best to plant it in the garden in autumn, from September to November, unless you live in a very cold region in winter, so you should plant it in March instead. Dig a hole much larger than the root system. Scratch the root ball with a slightly sharp tool to loosen the root mass and encourage growth. Place the bush in the hole without burying it too deep. Water well to compact the soil and remove air around the roots. Ensure the plant does not lack water in the first year after planting. Adding organic fertiliser at the start of the growing season is beneficial. Train the new stems as they grow.

Planting period

Best planting time March, October
Recommended planting time February to April, September to November

Intended location

Suitable for Meadow, Woodland edge
Type of use Climbing
Hardiness Hardy down to -18°C (USDA zone 7a) Show map
Ease of cultivation Beginner
Planting density 1 per m2
Exposure Sun, Partial shade
Soil pH Neutral, Any
Soil type Clayey (heavy), Clayey-chalky (heavy and alkaline), Silty-loamy (rich and light), fertile, deep, well-drained

Care

Pruning instructions Prune your Blackberry every year in November or March in cold climates. Remove the branches that have produced fruit by pruning them to 2 buds at ground level, and keep the young branches of the year that will give you fruit the following year. Ideally, you should have four branches to concentrate the vigour; beyond that, you risk harvesting many small fruits. Since this Blackberry has vigorous growth, it needs to be trained. To help you identify the shoots to prune, you can direct all the year's branches to one side (for example, the right side) and prune the other side to 2 buds above the ground. This way, the following year, the new shoots will all be on the left side, and at the end of the year, you will prune the entire right side, and so on.
Pruning Pruning recommended once a year
Pruning time March, November
Soil moisture Tolerant
Disease resistance Good
Overwinter Can be left in the ground

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